Concentrator.



j To whomithmttyconcern/i Beit known that I, HARRY II. CAMPBELL, a

i Naslae're.

.f Haampn.CAMBBELDF sTELToN, PENNSYLVANIA.

' citizen ofthennitedstates, resida at steelton, in thecoun'ty of Dauphinan l State of y tion,` Fig.V 41 is afdetail of thesWitch'I- for n Pennsylvania ,.haveinvente'd certain new and useful Improvements. in ,Concentratora of which the following is afull, clearhand exact description, reference being had to theac` y companyingdrawings, of 'which-4 c f Figure 1 is aplan view. l Fig. 2vis a trans# verse section,"V Fig. 3 is a longitudinalseccausing-the demagnetization and -reinag'neti f 4zation of the magnets.

i Thishinvention yrelatesto improvements in apparatus for separating the magnetizable.

' fromv the non-magnetizable particles of ores.

The invention consists ofthe combination of a vsupportor table, means for imparting motionthereto, a series 'or row of electrornagfl netsadjacent and arranged in a row substan- Qtially parallel with and7 transverse. to i the lline of movement of said support, means for reciprocatingsaid ma nets inl a direction transverse to the line t ereof, means for demagneti'zing said magnetsv during the length f of their forward movement and? for magnetizing themv during the lengthl of their return.-

\ movement and meansy tending to carry the material yto be 'treated overl and upon said support in a direction `substantially parallel with the line of said magnet series; The invention further consists of a reciprof catory table, preferably sloping, a', series.A of

electroln'a nets'adjacent thereto, arranged in a row in a ine'with the slope ofthe table, and means for demagnetizingfand remagnetizing said magnets `at predetermined times with relation ytn the reciprocations and throw of the table, Iwhereby separation of theore particles above alluded to is effected in` amanner hereinafter particularly described.

The invention also co'mprises certain fea. tures and details of construction hereinafter dulypointed out.' Referring to the accompanying4v drawings,

whichillustratc the preferred form ofthe in,-

V fra1ne'2, in suitable O'uideways of which the ,5

` f Specification of Letters Patent.y

` Appiicafiaitngaapru 14, 411904.y sesamo.' 203,'138.

ctromagnets 4` Patented March 20, 1906.

4, that are suitably connected with a source of electrical energy.- This bar is adapted to slide 'inguideways-of bars 5, that 'arefastened toa cross-bar of the frame 2. `Tlie table is connected by `a rod.7 to the strapof'an eccentric 8, mounted on a shaft 9, that is adapted to be kdriven bya belt (not shown) runnin overa pulley `10 on the shaft 9. Theybazr 3, t at sup-l ports the magnets,is connected by a rod y11 to the stra of an eccentric 12. f The rotationof the shat Q'fthat is, the eccentricsimparts reciprocatory. Amovements to the table and the series of magnets; Thetwo eccentrics are set, as shown, ysol that when vthe table moves in onedirectionlthe series'ofmagnets .move in the'opposlte dlrectlon. In order to effect'a sudden jolt or bump of the table at or n 'near the end of'its forward stroke, I pass the connecting-rod 7V through a hole in an arm 13 that depends from the under side of the tay ble.- On the part ofthe'rod beyond the said arm is a coil-spring 14, one end of which abuts againstthe latter and the other end against a collar 15 onrod `7, and on the opposite side of said arm is a similar spring 16, that abuts against the farm 13 andV against" a collar 17 on 'said -ro/d.v lThefirst-mentioned spring 14 is of greater resistance than-thesecond. The

eating concentrating-tables eing well known require no particular description.

18,'(which iscircuit with the ma 'nets and `use and operation of these springs in recipro- 35` Mounted on'the shaft 9 isa circular switch with a suitable source of electrica energy,) N

one `portion of which, 18a, is `of conductingl material and -the other portion,l 18h, of nonconducting'material, ,one of the brushes l19 tact with the portion 18a and the other.,brush 19a..will be in lcontact withthe` during lone-half1 of the revolution o the switch.

Along a portion of the highend of the table isa series of sprinklers l20, that communicate by a pipe 21 with a source of water-supply,

lowed to. flow upon land over the table..

Having described the construction of the invention, I proceed to explain the mode of o eration thereofas follows, premisingthat t e table is at about (the limit of its forward throw and the magnetsataboutk thelimit of their rearward stroke The ore incomminuted'o'r pulp form is allowed to flow upon yofwhi'chv switch willibe'in.continuous conortion. 18h i I whereby a stream or thin sheetv of water is al- I IOO 'the upperfcorner of the table at Fig. 1f, the l shaft 9 being then in motion, and thus reciprocating the table and magnets through the respective connections before described.

The tendency of the particles of ore is to descend the table by their gravity and assisted by the downflowing water, if the same be used; but as the table moves `forward it is jolted or bumped by reason of the described spring construction, the ore particles being thrown forward by their momentum in a line substantially at right angles to the course which they take by gravity or by the action ofthe water. The result is that the particles take a zigzag or diagonal course upon the table, as indicated in Fig. 1. When, however, the ore in that course comes into the field of the magnetized magnets, which is at the end of the forward stroke or the beginning of the return stroke, at which instant they are magngltized, they carry with them the magnetiza e cate by the dotted arrows 22 in Fig. 1, and when the magnets have reached the limit of their return stroke the said particles are released by the demagnetization of the magnets and are then free to move under the influence of the table and gravity, which table at the instant of demagnetization of thelmagnets reaches the end of its forward stroke, at l which the joltin or bumping action takes place, as before escribed.. The momentum of the particles throws them forward, as before, and they continue to travel in a diagonal zi zag line under the influence of gravity and t e successive bumps of the table until they come into the field of the next magnet below, when lit reaches the end of its forward stroke, and so on from magnet to magnet until being released by the lowermost magnet of the series these particles fall from the table at B. The non-magnetizable particles of the ore'take continuous diagonal zigzag linesaccording to their weight and fall from the table adjacent to the forward lower corner thereof. The dotted lines and arrows in Fig. 1 indicate the approximate `course of the magnetizable particles and the ifull lines and arrows that taken by the nonmagnetizable particles.

Other suitable means for advancing the particles of material across the table in lines substantially parallel with the line of the magnets may beemployed in lieu of that hereinbefore described.

Having thus described my invention, I claim as new and desire to secure by Letters Patent- 1. In an ore-separator, the combination of a suitable support for the material to be treated, a row of electromagnets adjacent said support, means for imparting reciprocatory movement to said magnets in a direction transverse to the line thereof, means for articles of the ore in the direction indicausing said support to move in a direction transverse to the line of said magnets, means for demagnetizing said magnets during the forward stroke and for magnetizing the same during the return stroke, and means tending to carry said material over and upon said support in a direction substantially parallel wit the line of said magnets, substantially as and for the purpose set forth.

2. In an ore-separator, the combination of the slidable table, means for imparting re'iprocatory motion thereto, means for imparting a sudden bump or jolt thereto at the end of its forward stroke, a series of electromagnets adjacent to said table in a line substantially at right angles to the line of reciprocation of the latter, means for effecting reciprocations of said magnets reverse to those of said table, means for magnetizing said magnets at the end of their forward stroke, and demagnetizing the same at the end of their return stroke together with means tending to advance the ore particles upon said table in lines transverse to the direction of reciprocation of said table and magnets, substantially as and for the purpose set forth.

3. In an ore-separator, the combination of the inclined slidable table, the series of electromagnets adjacent thereto in the line of the incline ,of said table, means for imparting a reciprocatory motion to said table, means for causing a sudden bump or jolt of the latter at the end of its forward reciprocation, means for effecting reciprocations of said series of magnets reverse to those of the table, and means for magnetizing said magnets at the end of their forward stroke and demagnetizing the same at the end of their return stroke, substantially as and for the purpose set forth.

4. In an ore-separator, the combination of a support for the material to be treated, means tending to move said material transversely over and upon said support, means for causing said support to move longitudinally,

an electromagnet adjacent said support,

means for ilnparting reciprocatory movement to said magnet in a direction at an angle to the direction of travel of the material across said support induced by said firstmentioned means, together with means for demagnetizing said magnet during its for- 'ward stroke and for magnetizing the same IOO IIO

IIS

` mgnets in a' direetion atk af an le di f xectin of travel `of thematerie across said fixed my signeturegthis'oth dey of Febru j ysupport induced Iby, rseid first mentioned f, ary, .A'.'\D.f1904."

the return stroke. 2. 

